Hi Richard,

在 2022/12/5 15:31, Richard Biener 写道:
> I wonder if you have a testcase you can add showing this change is
> worthwhile and
> fixes a bug?

I want to enable cbranchcc4 on rs6000. But not all sub CCmode is
supported on rs6000. So the predicate check(assert) fails and it hits
ICE. I drafted two patches. This one is for the generic code, and
another is for rs6000. If this one is committed, cbranchcc4 can be
enabled on rs6000. Then I can create a testcase and let the predicate
check fail. Right now I can't write a testcase for it as it never
reaches the failure path.

Thanks a lot
Gui Haochen

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